There are two parts to the game and four endings. You get ending A by playing both parts all the way through. After that, you begin each game at the beginning of part 2 but your playing time continues from the ending you just got.

So, to avoid a separate playthrough, the most efficient way to get 100% of the achievements is to play parts 1 and 2 as a speed run to get the A ending. Then, once you have the Lightspeed Fighter achievement, you will continue to play to get the B ending. You will start at the beginning of part 2. There are more than 30 side quests to be obtained in the second part so you can get all quest related achievements.

Note: There are four side quests that you should perform in part 1. Make a save and obtain the Sheep Whisperer achievement as described below:Solution for The Sheep Whisperer in NIER (JP)Once you have the Sheep Whisperer achievement, reload the game and accept Shopping List from the village florist. When that is complete, accept the follow-on quest from the village florist, A Return to Shopping. Also, accept the Boar Hunt side quest, perform it and return for the reward. Once you have the reward, make a save and obtain the All Aboared! achievement as described here:Solution for All Aboared! in NIER (JP)Once you have the All Aboared! achievement, reload the save you made just before going on the boar ride.

Note: There are quite a few side quests that are only available in part 1 but these are the only ones that are required for a 100% achievement completion. There are enough side quests in part 2 with several to spare to ensure you get the three quest achievements so your only focus in part 1 need be on those that are achievement related. The only two that must be completed as part of your speed run game are the two florist missions described above. The Boar Hunt side quest is not required. However, having the boar horn allows you to ride the boar and cover distance more rapidly thus shortening your time in the speed run.

When time is no longer an issue (during your first playthrough if you decided not to do a speed run) or working towards the B ending after completing a speed run to the A ending, perform all available quests. Quest givers are easy to find and are identified by speech bubbles over their heads. Accept each quest, satisfy the quest's conditions, and return to the quest giver for completion. When you have completed 10 quests, the achievement will unlock. You can go to the menu where you can find info on your quests by pressing .

Please log in to comment on this solution.

Do you have a question about this achievement? Please post it in the NIER (JP) Forum